freshman (n.)

1550s, "newcomer, novice," from fresh (adj.1) in the sense "making one's first acquaintance, inexperienced" + man (n.). Sense of "university student in first year" is attested from 1590s. As an adjective by 1805. Freshwoman is from 1620s. Related: Freshmen; freshmanic, freshmanship, freshmanhood.